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PRELIMS > RAD 104 prelims > Flashcards

RAD 104 prelims Flashcards

1
Q

What is the FFD in general radiography

A

40 - 42 inches

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2
Q

Is the exactness of representation of the patients anatomy on a radiographic image

A

Radiographic image quality

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3
Q

The degree of overall blackening of a radiograph
Amount of blackness on a given area of radiograph

A

Radiographic density

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4
Q

Combination of setting selected on the control panel

A

Radiographic technique

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5
Q

Uses light to expose the film

A

Intensifying screen

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6
Q

Few variation of black

A

high contrast

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7
Q

The OD that is inherent in the base of the film

A

Base density

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8
Q

Process of taking a radiograph

A

Radiography

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9
Q

Acceptable range for optical density

A

0.25 - 2.0

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10
Q

What is the FFD in the radiography of thoracic cavity

A

72 inches

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11
Q

Principal source of noise

A

Scattered radiation

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12
Q

Most important characteristics of radiographic image

A

spatial resolution
contrast resolution
noise
artifact

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13
Q

Primary control of xray quality (beam penetrability)

A

kilovoltage peak kVp

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14
Q

Too dark = high density = OVEREXPOSED

A

Too light = low density = UNDEREXPOSED

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15
Q

A quantitative factor that when combined with mA determines the exposure rate

A

Exposure time

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16
Q

Device used to reduce the intensity of scatter radiation in the remnant xray beam

A

Grid or Bucky

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17
Q

Blackening

A

Density

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18
Q

Tools for increasing radiographic quality

A

Patient positioning
Image receptor
Selection of exposure factors

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19
Q

Two types of radiation

A

Ionizing
non-ionizing

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20
Q

2 categories of image quality

A

Photographic aspect and Geometric Aspect

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21
Q

Interconnects resolution and noise

A

Speed

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22
Q

Noise that is caused by few xray

A

Quantum mottle

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23
Q

Measured from the focal spot to the recording medium (xray film) and is called FOCAL - FILM DISTANCE (FFD)

A

Distance

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24
Q

Black

A

Penetration

25
Q

Controls optical density

A

mAs

26
Q

Noise that is inherent to Intensifying screen

A

Structure mottle

27
Q

Process of taking a photograph

A

Photography

28
Q

milliamperage x exposure time

A

mAs

29
Q

kVp controls Contrast

A

mAs controls Density

30
Q

Capability of film to absorb light

A

Film speed

31
Q

Fog density

A

0.04

32
Q

Factor that selects the length of the time for an exposure

A

Exposure time

33
Q

Random fluctuations of the optical density of the radiograph
Speckled background on image
Grainy or uneven appearance of an image

A

Noise

34
Q

Variation of density level
Goal to make detail visible

A

Contrast

35
Q

4 significant factors

A

kVp mA exposure time SID

36
Q

Ability to image small objects that have high subject contrast

A

Spatial resolution

37
Q

Acceptable base density

A

0.14

38
Q

Ability to distinguish anatomical structures of similar subject contrast

A

Contrast resolution

39
Q

Is the most effective method for reducing the scattered radiation

A

Collimation

40
Q

Law that states that radiation intensity will vary inversely with the square of the distance from the source

A

Inverse square law

41
Q

Determines number of xray produced
Radiation quantity

A

milliamperage mA

42
Q

Many variation of black

A

Low contrast

43
Q

ALARA

A

As low as reasonably achievable

44
Q

Qualities of a good photograph

A

Composition
Focus
Evokes emotion or Tells a story

45
Q

The development of the silver grains that contain no useful information

A

Fog density

46
Q

Acceptable base + fog density

A

0.18

47
Q

White

A

Absorption

48
Q

Less precise term for spatial and contrast

A

Detail

49
Q

Clarity and sharpness of structural lines

A

Definition

50
Q

Factors that influence and determine the quantity and quality of xrays to which the patient is exposed

A

Exposure Factor

51
Q

The use of Intensifying screen decreases the patient dose by?

A

15 - 20

52
Q

Undesired change in the size and shape of the anatomic part

A

Distortion

53
Q

Is a systematic procedure used by the radiographer to accomplish task of producing a high quality radiograph

A

Radiographic technique

54
Q

Ejects electron using IR that results to scattered radiation

A

Compton interaction

55
Q

Capability of screen to produce light

A

Screen speed

56
Q

FFD is also called

A

Source - Image Distance (SID)

57
Q

Ability to image 2 separate objects and visually distinguish one from the other

A

Resolution

58
Q

What causes noise

A

Insufficient number of xrays
Uniform signal produced by scattered radiation
Faster screen speed

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